Method of making bags



July so, 1963 E. E- CURRIN ETAL METHOD OF MAKING BAGS Filed Jan. 19, 1961 FIGS.

FIGZ.

atent Patented July 30, 1963 3,099,237 METHOD OF MAKING BAGS Elbert E. Currin and Paul J. Davidson, Norfolk, Va., assignors to Bemis Bro. Bag Company, St. Louis, Mo., a corporation of Missouri Filed Jan. 19, 1961, Ser. No. 83,648 6 Claims. (Cl. 112262) This invention relates to bags, more particularly to the manufacture of so-called tie top open-mouth textile bags having a loop of tape attached thereto for tieing the top of each bag closed after it has been packed.

Among the several objects of this invention may be noted the provision of a method for the manufacture of an improved tie top bag construction in which .the loop of tape, while being secured in position looped around the bag to hold is in place during shipment, may be readily slipped off over the top of the bag for use in tieing the top closed after the bag has been packed; the provision of a method for the manufacture of a tie top bag constnuction such as described in which staggered end portions of the tape are caught in the, sewn side seam of the bag; and the provision of -a method for the economical manufacture of sewn tie top bags such as described which eliminates the hand operation of inserting a length of folded tape inside a folded bag blank prior to sewing. Other objects and features will be in part apparent and in part pointed out hereinafter.

The invention accordingly comprises the methods hereinafter described, the scope of the invention being indicated in the following claims.

In the accompanying drawings, in which one of various possible embodiments of the invention is illustrated,

FIG. 1 is a perspective illustrating certain steps of the method of this invention for making a bag;

FIGS. 2 and 3 are perspectives illustrating further steps in the method; and

FIG. 4 is a perspective illustrating a completed bag.

Corresponding reference characters indicate corresponding parts throughout the several views of the drawmgs.

Heretofore, tie top textile bags have been made by folding a rectangular bag blank in half on a fold line which constitutes one side of the bag, folding in half a length of tape and inserting it by hand inside the folded blank with the tape extending generally transversely of the blank adjacent what is to be the top of the bag, either with the ends of the tape or the fold in the tape 'at the open side of the folded blank, then sewing the blank to form a side and bottom seam, and turning the sewn blank inside out. If the ends of the tape are located at the open side of the folded blank, the bag is provided with a loop of tape having its ends caught in the bag side seam ad j-acent the top of the bag, but otherwise loose. If the fold of the tape is located at the open side of the folded blank, the bag is provided with a length of tape having the fold thereof caught in the bag side seam adjacent the top of the bag, but otherwise loose. In either case, there are two superimposed layers of tape material that must be sewn through in sewing the side seam. The present invention eliminates the manual operation of inserting .the tape inside the folded blank, thereby reducing the cost of manufacture, and produces a bag in which a loop of tape is removably secured in position extending around the bag adjacent the top of the bag to avoid having a loose dangling loop until the loop is to be used for tieing the top closed, at which time the loop may be readily slipped off over the top of the bag. It 'also provides for staggering of end portions of the tape at the side seam to avoid sewing through a double thickness of tape.

Referring to the drawings, there is indicated at 1 in FIG. 1 a continuous web of textile bag material being unwound from a roll R and fed in the direction toward the right. A continuous length of tape 3 is supplied from a roll 5 and combined with the web. This tape may be of any suitable material, such as cotton, for example. A light application of paste or any other suitable adhesive is made to one side of the tape 3, as froma paste reservoir 7 by means of a paste-applying roller 9. While the tape is shown herein as having paste applied continuously along its length, it will be nndera stood that it could be spot-pasted to the web. The tape is then lightly adhered to one face of the continuous web 1 adjacent one edge thereof to form a combined web of textile bag material and tape. The combined bag material and tape web is cut, by any suitable cutting means, along transverse lines 11 spaced apart a distance equal to twice the bag width desired to form rectangular bag blanks 13 each having a length 15 of tape extending from one cut edge of the blank to the other and lightly adhered to the blank.

In carrying out the operation of applying the tape 3 to the web 1, the tape is moved from side-to-side a distance somewhat greater than the width of the tape and at a rate correlated with the speed of web feed so that each tape length 15 is slightly inclined relative to the adjacent edge of the web material. Successive lengths '15 are oppositely inclined, and alternate tape lengths are similarly inclined.

Each of the blanks 13 is folded in half along a line 17 with the tape '15 on the inside of the folded blank. As a result of the inclination of the tape 15, the ends of the tape are staggeredor offset from one another along the side opposite the fold 17. Each folded blank is then sewn along the side opposite the fold 17 and along the end opposite the tape as shown in 'FIG. 3, so that a bag is formed having a side seam 19 and a bottom seam 21 and tape 15 on the inside, with each end of the tape caught in the side seam. With the ends of the tape staggered or oifset as described, only single thicknesses of the tape need be sewn through, and a firm securement of the tape ends is attained. The adhesive holds the tape 15 in place during the folding and sewing operations.

The bag in FIG. 3 is then turned inside out to bring the tape 15 to the outside to constitute a tie tape and to turn in the sewn seams. The tie tape .15 extends girthwise around the bag adjacent the open mouth of the bag, has each of its ends separately caught in the inturned side seam 19, and is lightly adhered to the outside of the bag. The adhesive keeps the loop of tape in place around the bag until it is to be used for tieing the top of the bag. However, the adhesive bond between the loop of tape and the textile bag material is easily broken to enable the tape to be grasped and pulled away from the bag, as indicated in dotted lines in FIG. 4.

While it is preferred that the ends of the tape 15 be staggered, it will be understood that certain advantages of the invention would still be attained without such staggering. This would simply involve applying tape 3 parallel to the adjacent edge of the web 1, and this is regarded as within the scope of the invention.

In view of the above, it will be seen that the several objects of the invention are achieved and other advan tageous results attained.

As various changes could be made in the above methods without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

We claim:

1. The method of making tie top bags comprising lightly adhering a continuous tape to one face of a continuous web of bag material with the tape extending longitudinally of the web adjacent one edge thereof, cutting the material with the tape thereon into bag blanks, folding each blank and the tape adhered thereto in half on a fold line transverse to the tape with the tape on the inside, seaming each folded blank along the side opposite the fold and the end opposite the tape to form it into a bag, and turning each folded and seamed blank inside out to bring the adhered tape to the outside, the adhesive bond being weak enough to permit the tape on each bag to be grasped and pulled away therefrom for use to tie the top of the bag closed.

2. The method of claim 1 wherein the tape is adhered to the web in such manner that its ends are stag gered along the side of the folded blank opposite the fold.

3. The method of making tie top bags comprising lightly adhering a narrow continuous tape of textile material to one face of a continuous web of bag material with the tape extending longitudinally of the web adjacent one edge thereof, cutting the material and narrow tape of textile material into blanks, folding each blank and the tape adhered thereto in half on a fold line transverse to the tape with the tape of textile material on the inside, sewing each folded blank along the side opposite the fold and the end thereof opposite the tape to form bags, and turning the bags inside out to bring the adhered tape of textile material to the outside, the tape on each bag being adapted to be pulled away therefrom for use to tie the top of the bag closed.

4. The method of claim 3 wherein the tape is adhered to the web in such manner that the tape on each tblank is inclined relative to the adjacent edge of the blank thereby to stagger the ends of the tape along the side of the folded blank opposite the fold.

5. The method of making tie top bags comprising pro- -viding a continuous web of bag material and a continuous tape, applying paste to one side of said continuous tape, lightly adhering said continuous tape to one side of said continuous web with the tape extending longitudinally of the web adjacent one edge thereof, cutting the material with the tape thereon into bag blanks, folding each blank and the tape adhered thereto in half on a fold line transverse to the tape with the tape on the inside, seaming each folded Iblank along the side opposite the fold and the end opposite the tape to form it into a bag, and turning each folded and seamed blank inside out to bring the adhered tape to the outside, the tape on each bag being adapted to be pulled away therefrom for use to tie the top of the bag closed.

6. The method of claim 5 wherein the tape and web are shifted relative to one another from side-to-side during the application of the tape to the web in such manner that the tape on each blank is inclined relative to the adjacent edge of the blank thereby to stagger the ends of the tape along the side of the folded blank opposite the fold.

References Cited in the file of this patent UNITED STATES PATENTS 1,181,148 Linton May 2, 1916 1,920,824 West Aug. 1, 1933 2,165,289 Milmoe et al. July 11, 193-9 2,370,079 Schmidt Feb. 20, 1945 2,550,464 Gleave et a1 Apr. 24, 1951 2,656,769 Hultkrans Oct. 27, 1953 2,863,365 Piazze Dec. 9, 1958 2,864,285 Roselius Dec. 16, 1958 2,980,313 Quinn Apr. 18, 1961 

1. THE METHOD OF MAKING TIE TOP BAGS COMPRISING LIGHTLY ADHERING A CONTINUOUS TAPE TO ONE FACE OF A CONTINUOUS WEB OF BAG MATERIAL WITH THE TAPE EXTENDING LONGITUDINALLY OF THE WEB ADJACENT ONE EDGE THEREOF, CUTTING THE MATERIAL WITH THE TAPE THEREON INTO BAG BLANKS, FOLDING EACH BLANK AND THE TAPE ADHERED THERETO IN HALF ON A FOLD LINE TRANSVERSE TO THE TAPE WITH THE TAPE ON THE INSIDE, SEAMING EACH FOLDED BLANK ALONG THE SIDE OPPOSITE THE FOLD AND THE END OPPOSITE THE TAPE TO FORM IT INTO A BAG, AND TURNING EACH FOLDED AND SEAMED BLANK INSIDE OUT TO BRING THE ADHERED TAPE TO THE OUTSIDE, THE ADHESIVE BOND BEING WEAK ENOUGH TO PERMIT THE TAPE ON EACH BAG TO BE GRASPED AND PULLED AWAY THEREFORM FOR USE TO TIE THE TOP OF THE BAG CLOSED. 